Ureters are the tubes that transport urine from the kidneys to the bladder. There are two ureters in the human body, one connected to each kidney. Ureteral tubes are made of smooth muscle that contracts to push urine from the kidneys to the bladder. Ureters can get blocked and infected.
Ureter. Ureter disorders include: Duplication of the ureter: a congenital (from birth) condition in which two ureters form on the same kidney. Ureteropelvic junction obstruction: this occurs when the connection between the kidney and ureter is blocked, preventing urine from exiting the kidney.
Medically reviewed by Healthline’s Medical Network on March 25, 2015. The ureter is a tube that carries urine from the kidney to the urinary bladder.